00841834_000001Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D1829/Credit:Yan Lerval/SIPA/1801281413

00841834_000002Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss fans are cheering up Swiss tennis player Roger Federer in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D1830/Credit:Yan Lerval/SIPA/1801281413

AP22157519_000292Australian Open Tennis01/28/2018Dita Alangkara/AP/SIPASwitzerland's Roger Federer, right, holds his winner's trophy as he talks with Croatia's Marin Cilic following the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 28, 2018. (AP Photo/Dita Alangkara)/XMEL197/18028466440114/1801281401

AP22157519_000294Australian Open Tennis01/28/2018Vincent Thian/AP/SIPASwitzerland's Roger Federer is congratulated by his Mirka after defeating Croatia's Marin Cilic during the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 28, 2018. (AP Photo/Vincent Thian)/MEL238/43dceb371e7c43b5877e1729c393b9ee-03f773db21ac4bf88b/1801281401

Shutterstock40626358_000035Tennis Australian Open Day Fourteen 28 Jan, Melbourne, USA - 28 Jan 201801/28/2018Sydney Low/CSM/Shutters/SIPAMandatory Credit: Photo by Sydney Low/CSM/REX/Shutterstock (9336833ai)
Number two seed Roger Federer of Switzerland poses for photographs with the trophy after winning the Men's Final against number six seed Marin Cilic of Croatia on day fourteen of the Australian Open Grand Slam tennis tournament in Melbourne, Australia. Federer won 3 sets to 2
Tennis Australian Open Day Fourteen 28 Jan, Melbourne, USA - 28 Jan 2018/Rex_Tennis_Australian_Open_Day_Fourt_9336833AI/1801281407

00841834_000067Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D2768/Credit:Yan Lerval/SIPA/1801281413

00841834_000003Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPARod Laver Arena during Swiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D1833/Credit:Yan Lerval/SIPA/1801281413

00841834_000008Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D1881/Credit:Yan Lerval/SIPA/1801281413

00841834_000063Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D2652/Credit:Yan Lerval/SIPA/1801281413

00841834_000065Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D2707/Credit:Yan Lerval/SIPA/1801281413

00841834_000074Tennis Australian Open finals Roger Federer vs Marin Cilic01/28/2018Yan Lerval/SIPASwiss tennis player Roger Federer is in action during his finals match at the Australian Open vs Bosniac tennis player Marin Cilic on Jan 28, 2018 in Melbourne, Australia.//LERVALYAN_YL1D2882/Credit:Yan Lerval/SIPA/1801281413